I pulled a Martin Erat 01/10 Upper Deck series 2 Exclusive card number 349. I've pulled some out of x/100 before, but did not know x/10 existed. I've not been able to locate any other cards like this. Is anyone familiar with this type of insert x/10? Curious to what it may be worth, as well.

The #'d/10 are spectrum exclusives. I pulled 3 from my 11-11 UD purchases. As far as it being a "high gloss" I don't think so, the finish looks exactly the same as the exclusives #'d/100
As far as I can tell there are no high gloss in 11-12